From what be described of 'mrodgers' : I would take it that 'mrodgers' has a bike so different from the "pack", that the other "riders" know that the "mountain bike" not be part of the group. But with the m.b. of mrodgers being within that group, for so much time/distance --- I take it that that the group was showing to whom be 'mrodgers' -- that he was BEING ACCEPTED.
("as part of the group" --- as another BF member said)
Other groups would have a dispute, such as: (a)yelling a non-member out, (b) out-running a non-member -- just as cars do against bikes.
Like car-to-car road-rage.

DON'T COMPLAIN.